Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java @ 1946:a584a26d5fde

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Introduce pre-rendering inter-facet communication phase ('blackboard pass'). flys-artifacts/trunk@3336 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 30 Nov 2011 10:18:38 +0000
parents f84ddc205c8b
children 5642a83420f2
rev   line source
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1 package de.intevation.flys.artifacts.services;
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2
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3 import org.w3c.dom.Document;
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4
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5 import org.apache.log4j.Logger;
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6
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7 import java.util.Map;
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8 import java.util.HashMap;
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9
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10 import de.intevation.artifacts.Artifact;
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11 import de.intevation.artifacts.CallMeta;
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12 import de.intevation.artifacts.GlobalContext;
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13 import de.intevation.artifacts.ArtifactDatabase;
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14 import de.intevation.artifacts.ArtifactDatabaseException;
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15
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16 import de.intevation.artifacts.common.utils.XMLUtils;
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17 import de.intevation.artifacts.common.utils.StringUtils;
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18
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19 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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20
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21 import de.intevation.flys.artifacts.datacage.Recommendations;
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22
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23 import de.intevation.flys.artifacts.FLYSArtifact;
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24
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25 public class MetaDataService
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26 extends FLYSService
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27 {
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28 private static Logger log = Logger.getLogger(MetaDataService.class);
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29
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30 public static final String XPATH_ARTIFACT_ID = "/art:meta/art:artifact-id/@value";
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31 public static final String XPATH_USER_ID = "/art:meta/art:user-id/@value";
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32 public static final String XPATH_OUTS = "/art:meta/art:outs/@value";
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33 public static final String XPATH_PARAMETERS = "/art:meta/art:parameters/@value";
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34
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35 /** The global context key of the artifact database. */
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36 public static final String ARTIFACT_DATA_BASE_KEY =
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37 "global.artifact.database";
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38
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39 public MetaDataService() {
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40 }
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41
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42 @Override
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43 protected Document doProcess(
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44 Document data,
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45 GlobalContext globalContext,
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46 CallMeta callMeta
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47 ) {
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48 log.debug("MetaDataService.process");
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49
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50 String artifactId = XMLUtils.xpathString(
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51 data, XPATH_ARTIFACT_ID, ArtifactNamespaceContext.INSTANCE);
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52
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53 if (artifactId != null
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54 && (artifactId = artifactId.trim()).length() == 0) {
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55 artifactId = null;
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56 }
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57
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58 String userId = XMLUtils.xpathString(
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59 data, XPATH_USER_ID, ArtifactNamespaceContext.INSTANCE);
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61 if (userId != null
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62 && (userId = userId.trim()).length() == 0) {
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63 userId = null;
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64 }
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65
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66 String outs = XMLUtils.xpathString(
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67 data, XPATH_OUTS, ArtifactNamespaceContext.INSTANCE);
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68
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69 String parameters = XMLUtils.xpathString(
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70 data, XPATH_PARAMETERS, ArtifactNamespaceContext.INSTANCE);
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71
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72 return doService(
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73 artifactId, userId, outs, parameters, globalContext);
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74 }
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75
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76 protected static Map<String, Object> splitParameters(
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77 String parameters,
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78 Map<String, Object> data
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79 ) {
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80 if (parameters != null) {
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81 String [] parts = parameters.split("\\s*;\\s*");
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82 for (String part: parts) {
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83 String [] kv = part.split("\\s*:\\s*");
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84 if (kv.length < 2 || (kv[0] = kv[0].trim()).length() == 0) {
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85 continue;
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86 }
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87 String [] values = kv[1].split("\\s*,\\s*");
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88 data.put(kv[0], values.length == 1 ? values[0] : values);
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89 }
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90 }
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91 return data;
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92 }
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93
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94 protected Document doService(
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95 String artifactId,
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96 String userId,
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97 String outsString,
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98 String parameters,
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99 GlobalContext globalContext
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100 ) {
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101 Document result = XMLUtils.newDocument();
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102
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103 FLYSArtifact flysArtifact;
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104
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105 if (log.isDebugEnabled()) {
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106 log.debug("artifact : " + artifactId);
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107 log.debug("user : " + userId);
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108 log.debug("outs : " + outsString);
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109 log.debug("parameters: " + parameters);
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110 }
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111
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112 if (userId != null && !StringUtils.checkUUID(userId)) {
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113 log.warn("'" + userId + "' is not a UUID");
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114 return result;
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115 }
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116
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117 if (artifactId != null) {
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118 if (!StringUtils.checkUUID(artifactId)) {
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119 log.warn("'" + artifactId + "' is not a UUID");
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120 return result;
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121 }
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122
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123 Object dbObject =
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124 (ArtifactDatabase)globalContext.get(ARTIFACT_DATA_BASE_KEY);
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125
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126 if (!(dbObject instanceof ArtifactDatabase)) {
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127 log.error("Cannot find artifact database");
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128 return result;
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129 }
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130
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131 ArtifactDatabase db = (ArtifactDatabase)dbObject;
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132
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133 Artifact artifact;
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134
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135 try {
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136 artifact = db.getRawArtifact(artifactId);
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137 }
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138 catch (ArtifactDatabaseException adbe) {
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139 log.warn("fetching artifact failed", adbe);
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140 return result;
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141 }
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142
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143 if (!(artifact instanceof FLYSArtifact)) {
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144 log.warn("artifact is not a FLYS artifact.");
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145 return result;
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146 }
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147
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148 flysArtifact = (FLYSArtifact)artifact;
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149 }
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150 else {
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151 flysArtifact = null;
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152 }
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153
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154
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155 Map<String, Object> data = splitParameters(
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156 parameters, new HashMap<String, Object>());
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157
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158 String [] outs = outsString == null
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159 ? new String [0]
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160 : outsString.split("\\s*,\\s*");
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161
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162 Recommendations rec = Recommendations.getInstance();
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163 rec.recommend(
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164 flysArtifact, userId, outs, data, result);
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165
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166 return result;
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167 }
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168 }
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169 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org